grandpa - Here's just my personal experience from that River.

Early on in September, when the coho are first coming in, they will readily bite Wiggle Warts and Dick Nites. They are all chromer fish, and very aggressive.

Now, that being said, starting about October, those silly fish get some serious lock jaw. They darken up pretty quickly and are hard to get to bite. You can still get them to take a wrapped K-15 in the Sky later in October. Once the Snoho get's a big push of water and the fish all move up in to the Sky, they will bite again on the dropping river, but once the river cleans and clears up, they get lock jaw.

You can have big numbers on the Snoho, but it usually is early on with aggressive fish. By now, there usually is a big push of water and all the coho are up river in the Sky. If the fish are in the Snoho now, I bet they'd have some serious lock jaw.